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Bug fixes (878913, 880666)

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- Ensure that hashtable size is greater than 3 (#878913).
  - fwrite returns 0 on EOF (#880666).
This commit is contained in:
Siddhesh Poyarekar 2012-11-27 21:31:22 +05:30
parent 0a6b9006e7
commit 99d5069200
3 changed files with 188 additions and 1 deletions
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27
glibc-rh878913.patch Normal file
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@ -0,0 +1,27 @@
diff --git a/nss/makedb.c b/nss/makedb.c
index 8d7d027..fdcf4c6 100644
--- a/nss/makedb.c
+++ b/nss/makedb.c
@@ -591,10 +591,12 @@ copy_valstr (const void *nodep, const VISIT which, const int depth)
}
+/* Check if a number is prime. We check only odd numbers greater than 10.
+ Enter even numbers and watch the function fail in mysterious ways. Odd
+ numbers less than 10 return false even if they are prime. */
static int
is_prime (size_t candidate)
{
- /* No even number and none less than 10 will be passed here. */
size_t divn = 3;
size_t sq = divn * divn;
@@ -605,7 +607,7 @@ is_prime (size_t candidate)
++divn;
}
- return candidate % divn != 0;
+ return (candidate >= divn && candidate % divn != 0);
}

148
glibc-rh880666.patch Normal file
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@ -0,0 +1,148 @@
commit d2e8e5132b806951a389ee87bccc7e55ccf4a02e
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Sun Nov 25 15:30:07 2012 +0530
Make fwrite return 0 on EOF
diff --git a/libio/Makefile b/libio/Makefile
index 9ccd6a0..83d90d0 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -59,7 +59,8 @@ tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
tst-memstream1 tst-memstream2 \
tst-wmemstream1 tst-wmemstream2 \
bug-memstream1 bug-wmemstream1 \
- tst-setvbuf1 tst-popen1 tst-fgetwc bug-wsetpos bug-fclose1 tst-fseek
+ tst-setvbuf1 tst-popen1 tst-fgetwc bug-wsetpos bug-fclose1 tst-fseek \
+ tst-fwrite-error
ifeq (yes,$(build-shared))
# Add test-fopenloc only if shared library is enabled since it depends on
# shared localedata objects.
diff --git a/libio/iofwrite.c b/libio/iofwrite.c
index d4610f7..e93a656 100644
--- a/libio/iofwrite.c
+++ b/libio/iofwrite.c
@@ -43,11 +43,19 @@ _IO_fwrite (buf, size, count, fp)
written = _IO_sputn (fp, (const char *) buf, request);
_IO_release_lock (fp);
/* We have written all of the input in case the return value indicates
- this or EOF is returned. The latter is a special case where we
- simply did not manage to flush the buffer. But the data is in the
- buffer and therefore written as far as fwrite is concerned. */
- if (written == request || written == EOF)
+ this. */
+ if (written == request)
return count;
+ /* It is possible that the data was written out into buffer and we just
+ failed to flush it out. However, this is not necessarily always the
+ case and we cannot really differentiate this with a case when a flush
+ failed and all of the data was not in the buffer. Hence, just return 0
+ (the flush failure should already have set the errno) and let the user
+ decide what to do. A future enhancement could be to find out how much
+ data is in the buffer and return that as a short write instead of just
+ 0. */
+ else if (written == EOF)
+ return 0;
else
return written / size;
}
diff --git a/libio/iofwrite_u.c b/libio/iofwrite_u.c
index a1077ee..bc533dd 100644
--- a/libio/iofwrite_u.c
+++ b/libio/iofwrite_u.c
@@ -45,11 +45,19 @@ fwrite_unlocked (buf, size, count, fp)
{
written = _IO_sputn (fp, (const char *) buf, request);
/* We have written all of the input in case the return value indicates
- this or EOF is returned. The latter is a special case where we
- simply did not manage to flush the buffer. But the data is in the
- buffer and therefore written as far as fwrite is concerned. */
- if (written == request || written == EOF)
+ this. */
+ if (written == request)
return count;
+ /* It is possible that the data was written out into buffer and we just
+ failed to flush it out. However, this is not necessarily always the
+ case and we cannot really differentiate this with a case when a flush
+ failed and all of the data was not in the buffer. Hence, just return 0
+ (the flush failure should already have set the errno) and let the user
+ decide what to do. A future enhancement could be to find out how much
+ data is in the buffer and return that as a short write instead of just
+ 0. */
+ else if (written == EOF)
+ return 0;
}
return written / size;
diff --git a/libio/tst-fwrite-error.c b/libio/tst-fwrite-error.c
new file mode 100644
index 0000000..3c0cf49
--- /dev/null
+++ b/libio/tst-fwrite-error.c
@@ -0,0 +1,66 @@
+/* Test of fwrite() function, adapted from gnulib-tests in grep.
+ Copyright (C) 2011-2012 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+static int
+do_test (void)
+{
+ char tmpl[] = "/tmp/tst-fwrite-error.XXXXXX";
+ int fd = mkstemp (tmpl);
+ if (fd == -1)
+ {
+ printf ("mkstemp failed with errno %d\n", errno);
+ return 1;
+ }
+ FILE *fp = fdopen (fd, "w");
+ if (fp == NULL)
+ {
+ printf ("fdopen failed with errno %d\n", errno);
+ return 1;
+ }
+
+ char buf[5] = "world";
+ setvbuf (fp, NULL, _IONBF, 0);
+ close (fd);
+ unlink (tmpl);
+ errno = 0;
+
+ int ret = fwrite (buf, 1, sizeof (buf), fp);
+ if (ret != 0)
+ {
+ printf ("fwrite returned %d\n", ret);
+ return 1;
+ }
+ if (errno != EBADF)
+ {
+ printf ("Errno is not EBADF: %d\n", errno);
+ return 1;
+ }
+ if (ferror (fp) == 0)
+ {
+ printf ("ferror not set\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"

14
glibc.spec
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@ -27,7 +27,7 @@
Summary: The GNU libc libraries
Name: glibc
Version: %{glibcversion}
Release: 30%{?dist}
Release: 31%{?dist}
# GPLv2+ is used in a bunch of programs, LGPLv2+ is used for libraries.
# Things that are linked directly into dynamically linked programs
# and shared libraries (e.g. crt files, lib*_nonshared.a) have an additional
@ -166,6 +166,12 @@ Patch2027: %{name}-rh819430.patch
# See http://sourceware.org/ml/libc-alpha/2012-06/msg00074.html
Patch2028: %{name}-rh767693-2.patch
# RH BZ 878913
Patch2049: %{name}-rh878913.patch
# RH BZ 880666
Patch2050: %{name}-rh880666.patch
Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
Obsoletes: glibc-profile < 2.4
Obsoletes: nss_db
@ -437,6 +443,8 @@ package or when debugging this package.
%patch0046 -p1
%patch0047 -p1
%patch0048 -p1
%patch2049 -p1
%patch2050 -p1
# On powerpc32, hp timing is only available in power4/power6
# libs, not in base, so pre-power4 dynamic linker is incompatible
@ -1231,6 +1239,10 @@ rm -f *.filelist*
%endif
%changelog
* Tue Nov 27 2012 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.16.90-31
- Ensure that hashtable size is greater than 3 (#878913).
- fwrite returns 0 on EOF (#880666).
* Mon Nov 26 2012 Jeff Law <law@redhat.com> - 2.16.90-30
- Resync with upstream sources
- Drop local patch for getconf.